Improvement in adjusting apparatus for cut-off valves



v H. 0. BULL.

Adjusting Apparatus for Cut-Dif Valves.

fj NO 159071, -Parentedlamznsm YNE SRQFHIC cQAPHoYO-Ll'masav PARK PLA E UNITED STATES PATENT OFFICE.

HENRY C. BULL, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND M. A. SOUTHWORTH, OF NEW ORLEANS, LOUISIANA.

IMPROVEMENT IN ADJUSTlNG APPARATUS FOR-CUT-OFF VALVESl Specification forming part of Letters Patent No. 159,071, dated January 26, 1875; application filed July l1, 1874.

To all whom it may concern:

Be it known that I, HENRY C. BULL, ot' New York, in the county of New York and State of New York, have invented a new and Improved Adjusting Apparatus for Out-Ott' Valves, of which the following is a specification My invention consists of two cut-off valves, one for each port ot' the slide-valve, having in- Lvdependent rods extending out through the stea1nchest, one within another, and connected with an adjusting-nut, one by aright-hand, and the other by a left-hand, screw, so that the sleeve which is swiveled to the eccentricrol, being turned right or left, will shift the valves toward-or from each other simultaneously and alike.

The essential object of contriving the adjusting device outside of the steam-chest is to enable the screws to be made so large that sufficient movement of the Valves may be obtained by a quarter-turn of the adjusting-nut, which is provided with a handle on one side for the purpose.

Figure lis a sectional elevation of an engine with my improved cut-ovalve adjusting apparatus. Fig. 2 is a side elevation of the adjusting-nnt, showing the manner of swiveling it to the eccentric.

Similar letters of reference indicate corre* spending parts.

A and B represent the two valves. C represents the stem of B. It is hollow, and the stem D of valve A passes through it, and extends a little beyond, out of a stufngbox, E,in the end of stem C, to prevent steam from leaking. Both stems have an enlargement, F, on the end, one of which has a right-hand thread, and the other a left-hand one, and they screw in a right and left hand threaded adjusting-nut, G, which is swiveled to the eccentric-rod H by a sleeve, I, or, it may be by any other suitable meansfso that the nut may be turned forward and backward half a turn,

more or less, by a handle, J, which is connected to it for the purpose, thus affording a` means of shifting the valves merely by the' vent it from working around; and rod O may have stud-pins or guides of any kind for the saine purpose.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the cut-off valves A B within the steam-chest, connecting-rods C D, having threaded heads, right and left threaded adj Listing-nut G, the swiveled sleeve, and the eccentric, substantially as shown and described, to operate as specified.

2. The combination of valve-rod D, tubular valve-rod C, stuffing-box E, and sleeve G, substantially as shown and described.

HENRY C. BULL. Witnesses:

T. B. MosnER, ALEX. F. ROBERTS. 

